Directive properties of active coated nano-particles

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Journal Article
Advanced Electromagnetics, 2012, 1 (1), pp. 57 - 64
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© 2012, Advanced Electromagnetics. All rights reserved. The directivities of the fields radiated by a variety of cylindrical and spherical active coated nano-particles, which are excited by their respective sources of illumination at optical frequencies, are investigated. Particular attention is devoted to the influence of the source location and optical gain constant on the directivities. While significant variations in the directivities are realized in the cylindrical cases for different source locations within and slightly outside the nano-particles and values of the optical gain constant, the corresponding spherical cases exhibit negligible differences.
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